Coelostat

noun

Definitions

Noun
  1. 1
    A device that rotates a telescope so as to keep its orientation constant with relation to the stars.
  2. 2
    optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror wordnet

Etymology

Related to Latin coelestis (“sky”), corrupted form of caelestis, + -stat.

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